diff --git a/diy.py b/diy.py
index 1e56835..190b382 100644
--- a/diy.py
+++ b/diy.py
@@ -4,8 +4,9 @@ cost= {'苹果':5.2,'山竹':12.9,'香蕉':2.4,'荔枝':15,'葡萄':9.3,'桂圆'
 k=input('请输入水果名称：')
 v=input('请输入水果价钱：')
 
-    if k in cost
-    if 
+if k in cost:
+    if float(v)<cost[k]:
+
         
         print(k+'降价了，现价'+v+'元')
     else: